WO2003071961A1 - Guide de resection de la rotule - Google Patents

Guide de resection de la rotule Download PDF

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Publication number
WO2003071961A1
WO2003071961A1 PCT/US2003/005726 US0305726W WO03071961A1 WO 2003071961 A1 WO2003071961 A1 WO 2003071961A1 US 0305726 W US0305726 W US 0305726W WO 03071961 A1 WO03071961 A1 WO 03071961A1
Authority
WO
WIPO (PCT)
Prior art keywords
patella
reamer
central
guide
cutting
Prior art date
Application number
PCT/US2003/005726
Other languages
English (en)
Inventor
Donald M. Smucker
Richard R. Van Zile
Original Assignee
Nemcomed Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nemcomed Ltd. filed Critical Nemcomed Ltd.
Priority to EP03743240A priority Critical patent/EP1478288A4/fr
Priority to CA002475142A priority patent/CA2475142C/fr
Priority to JP2003570709A priority patent/JP2005518240A/ja
Priority to AU2003216416A priority patent/AU2003216416A1/en
Publication of WO2003071961A1 publication Critical patent/WO2003071961A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee
    • A61B17/1767—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee for the patella
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/15—Guides therefor
    • A61B17/154—Guides therefor for preparing bone for knee prosthesis
    • A61B17/158—Cutting patella
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1675—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the knee
    • A61B17/1677—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the knee for the patella
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B2017/1602—Mills
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/033—Abutting means, stops, e.g. abutting on tissue or skin
    • A61B2090/036—Abutting means, stops, e.g. abutting on tissue or skin abutting on tissue or skin

Definitions

  • the present patent application is directed to a patella resection guide for permitting precise measurement of the depth of a resection cut of the patella which may be used to support the patella and perform a precise resection cut from the dome portion without everting the patella.
  • the resection device of the present invention permits the patella to be resectioned without the necessity of everting it thereby simplifying the procedure and permitting it to be performed in a less invasive manner than was heretofore the case.
  • the resection device of the present invention permits other arthroplasty procedures to be performed without everting the patella including preparation of the distal end of the femur and the proximal end of the tibia.
  • Fig. 1 is a plan view of a patella resection guide of the present invention.
  • Fig. 2 is an elevational view of the patella resection guide with a patella engaged.
  • Fig. 3 is a perspective view of a resection guide adjustment member.
  • Fig. 4 is a view similar to Fig. 1 with phantom lines showing movement of various components of the patella resection guide.
  • Fig. 5 is a plan view of a patella preparation guide for sizing a patella and guiding a drill in preparation of patella.
  • Fig. 6 is an elevational view of the patella preparation guide being used in combination with the patella resection guide.
  • Fig. 7 is an elevational view of a circumferential patella reamer being guided by the patella preparation guide.
  • Fig. 8 is a perspective view of the circumferential patella reamer of Fig. 7.
  • Fig. 9 is a perspective view of a spacer washer designed for possible use with the circumferential patella reamer of Figs. 7 and 8.
  • Fig. 10 is a view showing the circumferential patella reamer in use in combination with the space washer.
  • Fig. 11 is a perspective view of a dome reamer for reaming the dome of a patella.
  • Fig. 12 is an elevational view of the dome reamer of Fig. 11 following reaming.
  • Fig. 13 is an elevational view of the patella preparation guide of Fig. 5 in use following reaming to guide the drilling of peg holes in the reamed surface of the patella.
  • Figs. 14 and 15 are views similar to Figs. 1 and 2, respectively, showing the patella resection guide in use with the upper surface of the guide/support member determining the path of cutting movement of the saw through the patella.
  • Fig. 16 is a perspective view of the patella resection guide modified to have a slotted guide/support member.
  • Fig. 17 is an elevational view of a modified embodiment of patella resection guide.
  • Fig. 18 is a plan view of the patella resection guide shown in Fig. 17.
  • Fig. 19 is a bottom view of the patella resection guide shown in Fig. 17.
  • Fig. 20 is a sectional view taken through line 20-20 of Fig. 18.
  • Fig. 21 is an elevational view of the patella resection guide of Figs. 17- 20 used in combination with a modified combination sizing/alignment guide.
  • Figs. 1, 2 and 4 show plan and elevational views of a patella resection guide 100 permitting precise control of the depth of a resection cut of a patella P.
  • the patella resection guide 100 includes a slide support 102 extending from a patella engagement end 103 to an opposing end 104 and having a forward central slot 105 and a rear slot 125.
  • the patella engagement end 103 extends longitudinally beyond the forward central slot 105 and is enlarged to extend laterally outwardly from the central axis of the forward central slot 05.
  • a pair of upstanding tabs 110 are mounted in spaced-apart relationship on the enlarged patella engagement end 103. Supported on each of the tabs 110 is a tapered patella engagement pin 111 each of which points rearwardly and inwardly toward the axis of the forward central slot 105.
  • a secondary guide member 108 is secured to the slide support 102 for slideable movement relative thereto.
  • the secondary guide member 108 includes a slide 112 on one side of the slide support 102 and a base 107 on the opposite side of the slide support 102.
  • a support pin 106 is secured to the leading end of the slide 112 and extends through the slot 105 and through the base 107, extending upwardly from the base 107.
  • a slideable cutting guide/support member 113 is pivotally mounted on the end of the support pin 106 for pivotal movement thereon.
  • the cutting guide/support 113 has a V-shaped configuration with a pair of patella engagement pins 111A extending toward the patella engagement end 103 and the patella engagement pins 111 supported on the tabs 110.
  • One of the patella engagement pins 111A is located on one side of the support pin 106 and the other patella engagement pin 111 A is on the opposite side of such support pin 106. Since the shape of a patella is P T/US03/05726
  • the feature of permitting the cutting guide/support 113 to pivot about the support pin 106 assures that both of the patella engagement pins 111A, as well as both of the patella engagement pins 111, will engage the patella P.
  • Fig. 4 shows in phantom lines the possible range of pivotal movement of the cutting guide/support 113 as well as longitudinal movement of the secondary guide member 108 from a rearward disengaged position to a forward engaged position.
  • Extending upwardly from the opposite end of the slide 112 from the pivot pin 106 is a threaded screw 124 which extends through the rear slot 125.
  • Encircling the rear slot 125 is a ledge 138 which is recessed from the upper surface of the slide support 102.
  • a flat head cap screw 117 is engaged to the threaded screw 124 and rests upon the ledge 130 for sliding engagement therewith thereby providing support and guidance for that end of the slide 112.
  • a base assembly 115 Supported on the opposing end 104 of the slide support 102 is a base assembly 115 having a pair of gripping handles 116 extending from opposite sides thereof.
  • a slideable plunger 118 Extending longitudinally through an opening in the base assembly 11.5 is a slideable plunger 118 having a gripping member 145 at the opposing end.
  • the plunger 118 is connected to the end of the slide 112 adjacent the screw 124 by means of a connector which permits the plunger 118 to be rotated 90° from the position shown in Figs. 1 and 2.
  • the plunger 118 has a generally circular cross section configuration but with a series of ratchet teeth 119 facing downwardly as viewed in Fig. 2 and a recessed flat surface 146 positioned 90° therefrom.
  • the ratchet teeth 119 and the recessed flat surface 146 extend longitudinally throughout a major portion of the plunger 118.
  • a pawl spring and pawl Housed within the enlarged base 115 is a pawl spring and pawl positioned to engage the ratchet teeth 119.
  • the pawl and spring are so positioned within the base assembly 115 as to permit the plunger 118 to T U 03/05726
  • the patella resection guide 100 When it is desired to grip the patella P, the patella resection guide 100 is positioned such that the enlarged area adjacent the patella engagement end 103 supports the anterior side of the patella P and then is moved to a position at which the patella engagement pins 111 supported on the tabs 110 engage the central portion of the patella.
  • the plunger 118 is then moved forward by pushing the gripping member 145 while holding the gripping handles 116 thereby causing the slide 112 to move toward the patella engagement end 103 and to grip the patella P with the patella engagement pins 111A carried on the slideable cutting guide 113.
  • the slideable cutting guide 113 is pivotally mounted on the support pin 106 to assure that the patella engagement pins 111A both engage the patella P notwithstanding any irregularities in the central portion of the patella P.
  • a spring loaded lock release 123 which may be depressed to permit the plunger 118 to be rotated 90° to thereby disengage the ratchet teeth 119 from the pawl. Such rotation can be accomplished because the plunger 118 is rotatably secured to the slide 112.
  • the lock release 123 has a cylindrical surface which engages the recessed flat surface 146 of the plunger 118 when it is in the raised position thereby maintaining the plunger 118 in a fixed rotatable position.
  • the lock release 123 is also provided with a short length adjacent the cylindrical surface having a recess on the side facing the plunger 118.
  • its recess becomes aligned with the plunger 118 thereby removing any contact of the lock release 123 with the recessed flat surface 146.
  • the removal of contact by the lock release permits the plunger 118 to be rotated 90° to disengage the ratchet teeth 119 from the pawl.
  • the plunger 118 may thenrbe retracted to disengage the patella engagement pins 111 A from the patella P.
  • the plunger 118 may have longitudinally extending line 147 embossed on the side opposite the ratchet teeth 119 in order to permit the surgeon to readily determine that the ratchet teeth 119 are facing in a position to engage the pawl.
  • a similar line 147A may also be embossed in the upper surface of the enlarged base 115 to assist the surgeon in rotatable alignment.
  • a support post 127 Extending upwardly from a central portion of the slide support 102, between the forward central slot 105 and rear slot 125 is a support post 127 which may be used to assist in proper preparation of the patella.
  • the patella resection guide as thus far described can be used for guiding a resectioning saw to cut the desired amount of the dome on the posterior surface of the patella.
  • the sizing of the slideable cutting guide/support 113 and its positioning of its upper surface above the surface of the enlarged area of the slide support 102 adjacent the patella engagement end 103 upon which the anterior surface of the patella P rests is designed to leave a predetermined amount of patella P, 13 to 16 mm, between such upper surface and the supported portion of the anterior surface resting upon the enlarged end adjacent the end 103.
  • the surgeon simply uses such upper surface of the slideable cutting guide/support 113 as a guide determining the plane of movement of the cutting saw.
  • an adjustment member 114 (see Fig. 3) which may be positioned on the slideable cutting guide 113 and retained thereon by a pair of posts 114A engaging in a pair of recesses 113A of the slideable cutting guide.
  • the posts 114A may be provided with C-shaped springs to permit their secure retention in the apertures 113A of the slideable cutting guide/support 113.
  • the adjustment member 114 has a thickness equal to the reduction in the amount of bone to be resected from the patella, for example 3 mm.
  • the slideable cutting guide/support 113 is solid throughout its breadth and the surgeon uses its upper surface as a guide for the saw during the resecting of the patella P. Some surgeons prefer to have a slot through which the cutting saw may extend to guide the resecting of the patella. Accordingly, if desired, the slideable cutting guide/support 113 could be replaced by a slotted cutting guide/support. Referring to Figs. 5-13, there is shown additional components which may be used with the patella resection guide 100 in the resectioning process. For some applications, it is preferred to resect the patella by reaming rather than by use of a cutting saw.
  • a combination sizing/alignment guide 130 designed to be adjustably positioned on the support post 127 of the resection guide 100.
  • the sizing/alignment guide 130 is shown as having a first enlarged head 170 at one end and a second enlarged head 171 at the opposing end joined together by an elongated arm 172.
  • the first enlarged head has a circular cross- sectional configuration of a certain diameter, for example 26 mm
  • the second enlarged head 171 has a circular configuration with the different size, for example 28 mm in diameter.
  • the elongated arm 172 has an elongated central slot 133.
  • the sizing/alignment guide 130 is supported on the support post 127 by a lower adjustment member 175 positioned to engage the bottom of the arm 172 on opposite sides of the slot 133 and an upper adjustment member 174 positioned to engage the top of the arm 172 on opposite sides of the slot 133.
  • the upper and lower adjustment members 174, 175 are circular and have a size approximating the breadth of the elongated arm 172.
  • the sizing/alignment guide 130 is useable both for drilling a hole in the central portion of the patella P either prior to any resecting of the dome 03 05726
  • the upper and lower adjustment members 174, 175 have the capability of supporting the sizing alignment guide 130 on the support post 127 at a number of different elevations. This can be accomplished in any one of a number of mechanisms well known in the art such as threaded engagement between the members or clamps engaged to the upper and lower adjustment members 174, 175 for clamping such members to the support posts 127.
  • Each of the first enlarge head 170 and second enlarge head 171 is provided with a central passageway .
  • the first and second enlarged heads 174 and 175 each extend downwardly below the lower surface of the arm 172 in order to provide a thickness sufficiently great that the central passageway 126 and the larger passageways 129 are long enough to accurately guide drills positioned therein.
  • each of the first and second enlarged heads 170 and 171 Extending downwardly from each of the first and second enlarged heads 170 and 171 are three alignment pins 135 which may rest upon the resected surface of the patella P prior to drilling an aperture for positioning the drill guide 128 when the patella is resected with a saw as described with reference to Figs. 1-4 or for engaging the resected flat surface preparatory to drilling the peg holes following reaming as hereinafter discussed with reference to Figs. 7-13.
  • the outside diameter of the enlarged head for example, the first enlarged head 170 or the second enlarged head 71 of the sizing alignment guide 130 is selected based upon the diameter of the patellar prosthesis implant intended for the patella P, which size depends upon the size of the patient and the condition of the patella being prepared.
  • the sizes of the enlarged heads 170, 171 may vary from 26 to 41 mm.
  • the positioning of the apertures 129 for each size of enlarged head 170 or 171 is determined by the positioning of the peg lugs of the patellar prosthesis to be implanted.
  • the sizing alignment guide 130 is shown as having two enlarged heads (first enlarged head 170 and the second enlarged head 171), this is done simply to reduce the ⁇ number of sizing alignment guides 130 required for a set with varying sizes from 26 to 41 mm in diameter. Only a single enlarged head 170, 171 will be used for guiding the drilling and reaming in the preparation of a specific patella.
  • the support post 127 is positioned at right angles to the slide support 102.
  • the pin alignment guide aperture 126 and the guide holes 129 for drilling the peg holes will be parallel to the support post 127.
  • the sizing/alignment guide 130 may be moved to the right or to the left as shown in Fig. 6 by virtue of the support post extending through the slot 133, so that the pin alignment guide aperture 126 is properly positioned relative to the dome 159 of the patella P.
  • a combination patella drill/guide pin 143 is affixed to a power drill at rounded end 140 and inserted through the guide hole 131.
  • the sharp trocar end 141 is advanced to a depth selected by the surgeon using the positioning of laser markings 139 on the drill/guide pin 143 for determining the depth.
  • the end of the drill/guide pin 143 will be provided with cutting threads 142 upwardly from the sharp trocar end 141 in order that the drill/guide pin 143 may be securely left in position in the newly drilled patella for use as a guide in the subsequent reaming and/or drilling steps.
  • the sizing/alignment guide 130 may then be removed from the support posts 127 or rotated out of alignment with the patella P to provide room for a circumferential patella reamer to be positioned over the drill/guide pin 143.
  • the patella P remains engaged by the engagement pins 111, 11 ⁇ 111 A, 111A during the reaming operation. The resecting can be done without everting the patella P whether the resecting is done with a saw or with reamers.
  • a circumferential reamer 180 which includes an enlarged head 184 having an outer circumferential wall 185 which may vary in size depending upon the size the patella being resected and an inner cylindrical wall 186 which may be of a fixed diameter on the order of 10 millimeters plus or minus 1 millimeter.
  • the distal end of the reamer 180 is provided with cutting teeth 187 which extend between the outer cylindrical wall 185 and inner cylindrical wall 186.
  • the apex 187A of the cutting teeth 187 define the plane of the cut surface 154 of the partially resected patella P as shown in Fig. 7.
  • the inner cylindrical wall 186 defines a cavity closed by an upper interior wall 188 disposed at right angles to the inner cylindrical wall 186.
  • the depth of the cavity may be fixed at approximately 10 mm as measured from the apex 187A of the cutting teeth 187 to the upper interior end 188.
  • the circumferential reamer 180 is provided with a tubular member 189 attached to the head 184 and an enlarged power means gripping portion 190 engageable with a drill or other power means in a manner well known in the art.
  • a central passageway 191 extends completely through the circumferential patella reamer 180 from the proximal end 192 to the upper interior wall 188 so that the circumferential patellar reamer 180 can be telescoped over the drill/guide pin 143 as shown in Fig. 7. As can also be seen in Fig.
  • the surgeon determines that the size or condition of the patella being reamed is such that reaming to a depth of 10 mm as measured from the dome 159 of the patella P to the cut surface 154 would be excessive, he may insert a washer such as the washer 193 shown in Figs. 9 and 10, into the inner cylindrical wall 186 and against the upper interior end 03 05726
  • a finishing reamer 194 having an enlarged head 195 with an outer circumferential wall 196 having a diameter substantially the same as the diameter of the outer cylindrical wall 185 of the circumferential reamer 180 and an inner cylindrical wall 197 substantially the same size as the inner cylindrical wall 186 of the circumferential patella reamer 180.
  • the finishing reamer 194 has a smooth distal end surface 198 extending between the outer cylindrical wall 196 and inner cylindrical wall 197.
  • the breadth of the end surface 198 is no greater than the breadth of the circumferential cut surface 154 reamed by the circumferential reamer 180 and is preferably the same breadth.
  • a series of cutting blades 164 Positioned in the space defined by the inner cylindrical wall 197 are a series of cutting blades 164, six in number as shown in Fig. 11 which are separated by open portals 165 through which bone chips generated during the reaming process may be expelled.
  • a tubular shaft 166 and power engaging means 167 extend from the enlarged head 195.
  • a cannulation passageway 169 extends completely through the finishing reamer 194.
  • the finishing reamer 194 is telescoped over the drill/guide pin 143. As shown in Fig. 12, the cutting surfaces 164 will then ream the dome 159 and adjacent portions of the patella P posterior side. The depth to which the dome 159 and adjacent surrounding bone will be reamed by the finishing reamer 194 will be limited by engagement of the smooth end surface 198 with the surface of the circumferential removed bone surface 154 reamed with the circumferential patella reamer 180. Following completion of reaming with the finishing reamer 194 as shown in Fig.
  • the sizing/alignment guide 130 may then again be positioned on the support post 127 with the enlarged head 170 telescoped over the drill/guide pin 143.
  • a drill 200 may then be successively guided through each of the peg alignment guide holes 129 to drill holes 201 for receiving the pegs of a patellar prosthesis implant to be positioned in the reamed surface of the patella P.
  • the drill 200 has a shaft which is enlarged from the cutting end portion 202.
  • Such enlarged shaft portion forms a distal shoulder 203 which engages the reamed surface of the patella P thereby limiting the depth to which the drill portion 202 can drill the peg hole 201.
  • Figs. 14 and 15 are views similar to Figs. 1 and 2, respectively, showing the resecting of a patella P with a saw blade S while using the upper surface of the slideable cutting guide/support 113 as a guide.
  • Fig. 16 shows a resection guide 100 which has a slotted cutting guide/support 213.
  • the slotted cutting guide 213 has a pair of slots 215, one on each side of the support pin 106. In performing the resecting operation, the surgeon simply inserts the saw blade S through the slots, first one and then the other, to resect the patella.
  • patella resection guide 220 which utilizes a shape under which the surgical assistant may engage and support the patella P and the resection guide 220 from the opposite side of the patient than in the embodiment of Figs. 1 and 2. This positioning permits the surgeon to perform the resectioning of the patella P from a position to the left as viewed in Figs. 17-19 without obstruction from such surgical assistant who may be positioned to the right as viewed in Figs. 17-19.
  • the modified patella resection guide 220 includes a slide support 222 and a slideable guide member 240.
  • the slide support 222 has a U-shaped configuration as viewed in elevation in Fig.
  • the upper leg 222A functions as a slide support and extends from its joinder with the third leg 222C to a patella engagement end 224 having a pair of upstanding tabs 226, each of which supports a patella engagement pin 227.
  • Each of, the patella engagement pins 227 extends at an angle inwardly toward the axis A and toward the third leg 222C.
  • the upper leg 222A has an enlarged patella support surface 228 adjacent the patella engagement end 224 and an axially extending slot 230 extending from a position near the patella support surface 228 toward the third leg 222C.
  • a post 232 Extending upwardly from the upper leg 222A is a post 232 having a recess 233 sized to receive and support a member to be hereinafter described.
  • the post 232 is provided with a radially extending threaded aperture 234 in which is received a threaded stem 235 Of a tightening handle 236.
  • the lower leg 222B is also provided with an axially extending slot 238 having a widened area adjacent the lower surface defining a downwardly facing shoulder 239.
  • the slideable guide member 240 includes an upper leg 240A slidingly engaged to the lower surface of the upper leg 222A of the slide support 222 and a lower leg 240B slidingly engaged to the upper surface of the lower leg 222B and a third leg 240C joining the legs 240A and 240B.
  • a support pin 242 (See Fig. 20) which extends through the slot 230 of the upper leg 222A of slide support 222 and has supported thereon a combination cutting guide and patella support member 244 which is similar to and functions in the same way as the cutting guide/support 113 of the embodiment of Figs. 1 and 2.
  • the cutting guide/support 244 is pivotally mounted on the support pin 242 and has a pair of patella engagement pins 245 extending therefrom. If desired, the cutting guide/patella support member 244 could be provided with slots such as the slots 215 of the embodiment of Fig. 16.
  • the lower leg 240B is slideably engaged to the upper surface of the lower leg 222B of the slide support 222.
  • the lower leg 240B has a pin 246 extending downwardly therefrom through the slot 238.
  • the pin 246 has an enlarged head 248 which engages the shoulder 239.
  • a slideable plunger 254 Secured to the end of the lower leg 240B and extending longitudinally through an opening in the base assembly 250 is a slideable plunger 254 similar to the slideable plunger 118 of the embodiment of Figs. 1 and 2.
  • the patella resection guide 220 When it is desired to grip the patella P, the patella resection guide 220 is positioned such that the anterior surface of the patella P rests on the support surface 228. The resection guide 220 is moved to a position at which the patella engagement pins 227 supported on the upstanding tabs 226 engage the central portion of the patella P. The slideable plunger 254 is then moved in a direction (to the right as viewed in Figs. 17, 18 and 19) which moves the cutting guide/patella support 244 toward the patella P to a position at which the patella engagement pins 245 engage the patella P. When so engaged, the resecting of the patella P according to one or more of the procedures previously described may be performed.
  • a combination sizing/alignment guide 260 which is used for similar purposes as the sizing alignment guide 130 of the embodiment of Figs. 5 and 6. As such, it includes first enlarged head 264 and a second enlarged head 266 at opposing ends of an elongated arm 268 having an elongated slot. Under this embodiment, however, the modified sizing/alignment guide 260 has a support pin 262 engaged thereto and extending through a longitudinal slot similar to the slot 133 of the embodiment of Fig. 5.
  • the sizing/alignment guide 260 is supported on the pin 262 by a pair of enlarged engagement nuts 270 and 272 which are threadedly engaged to the upstanding pin 262. Adjustment of the engagement nuts 270 and 272 on the pin 262 to loosen their engagement with the elongated arm 268 permits the sizing/alignment guide 260 to move longitudinally, rotationally and upwardly or downwardly on the 5726
  • the pin 262 may be supported in the cavity 233 of the post 232. Tightening of the handle 236 and its threaded stem 235 will firmly engage the pin 262 in the cavity 233.
  • the adjustment member 114 could also be provided with slots through which the saw could be guided.

Abstract

L'invention concerne un procédé et un dispositif pour la résection de rotules (P) sans formation de retroussement. Ledit dispositif comprend un guide de résection (100) qui serre la rotule (P) avec des éléments de préhension(113), dont un peut également faire office de guide d'alignement afin d'utiliser une scie pour la résection. Le guide de dimensionnement/d'alignement (130) peut entrer en prise avec le guide de résection et est prévu pour des forets d'alignement (143) et/ou des alésoirs (18) utilisés dans le cadre de la résection. Dans un mode de réalisation, il est prévu une paire d'alésoirs (180, 194) pour aléser la rotule en deux opérations de résection.
PCT/US2003/005726 2002-02-26 2003-02-25 Guide de resection de la rotule WO2003071961A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP03743240A EP1478288A4 (fr) 2002-02-26 2003-02-25 Guide de resection de la rotule
CA002475142A CA2475142C (fr) 2002-02-26 2003-02-25 Guide de resection de la rotule
JP2003570709A JP2005518240A (ja) 2002-02-26 2003-02-25 膝蓋骨切除ガイド
AU2003216416A AU2003216416A1 (en) 2002-02-26 2003-02-25 Patella resection guide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US35963102P 2002-02-26 2002-02-26
US60/359,631 2002-02-26

Publications (1)

Publication Number Publication Date
WO2003071961A1 true WO2003071961A1 (fr) 2003-09-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/005726 WO2003071961A1 (fr) 2002-02-26 2003-02-25 Guide de resection de la rotule

Country Status (6)

Country Link
US (2) US7344540B2 (fr)
EP (1) EP1478288A4 (fr)
JP (1) JP2005518240A (fr)
AU (1) AU2003216416A1 (fr)
CA (1) CA2475142C (fr)
WO (1) WO2003071961A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2386558B (en) * 2002-03-20 2005-09-14 Sheo B Tibrewal Apparatus for patella replacement
CN103705288A (zh) * 2012-09-28 2014-04-09 德普伊(爱尔兰)有限公司 髌骨钻导引器和试验性外科器械
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GB2386558B (en) * 2002-03-20 2005-09-14 Sheo B Tibrewal Apparatus for patella replacement
CN103705288A (zh) * 2012-09-28 2014-04-09 德普伊(爱尔兰)有限公司 髌骨钻导引器和试验性外科器械
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US20080114366A1 (en) 2008-05-15
CA2475142A1 (fr) 2003-09-04
EP1478288A4 (fr) 2010-06-02
US7344540B2 (en) 2008-03-18
CA2475142C (fr) 2009-04-28
AU2003216416A1 (en) 2003-09-09
EP1478288A1 (fr) 2004-11-24
US20030163137A1 (en) 2003-08-28
JP2005518240A (ja) 2005-06-23

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